OBSERVATIONS ON ACCESS TO OVERNIGHT SITES OF THE WHITE-COLLARED SWIFT (Streptoprocne zonaris) IN THE SIERRAS DE CÓRDOBA, ARGENTINA.

The communal roosting is a common behavior

in swift species. It has been suggested that such behavior reduces predation. Despite the importance of roosting cavity-entry behavior in the survival of gregarious birds, little is known about this behavior in the White-collared Swift (Streptoprocne zonaris). During 2016-2020, on five occasions we observed the cavity-entering behavior in White-collared Swift: at dusk, a large flock was formed near their nesting cavity. Subsequently, a smaller group separated from the main flock and sped towards the cavity. Of this group, only a few individuals entered, while the rest rejoined the main flock. The behavior reported in this note could be considered antipredatory and constitutes the first observations of the entrance behavior of the White-collared

Swift to the cavities it uses.